Bacterial Proteins Cell Fractionation Chlorophyll Cell Membrane Rhodopseudomonas microorganism rhodopseudomonas viridis theoretical study Adaptation, Physiological Bacterial Chromatophores Cell-Free System Centrifugation, Density Gradient Chromatography, Thin Layer Comparative Study Culture Media DNA, Bacterial Darkness Dialysis Electrophoresis Electrophoresis, Disc Evaluation Studies Fatty Acids Light Lipid and Protein Composition Lipids Membranes Methods Microscopy, Electron Mutation OSMOSIS